Exhaust-steam injector



June 9, 1925. 1,541,321

B. BROIDO EXHAUST STEAM INJECTOR 01.30. 1923 3 Sheets-Sheet l une 9, 1925e 1,541,321

' B. BROIDO EXHAUST STEAM INJECTR Filed OC.. 30. 1923 5 Sheets-Sheet 2 INVENTOR .BEM/AMW Ro/ no mu/M ATTORNEYS June 9,1925.

B. BROIDO EXHAUST STEAM INJEICTOR 3 Sheecs-Sheet rt u Filed Oct. 30. '1923 :NVENTOR 55mm/WN .B Ro/po BY m,

`ATTORNEYS I Patented lune 9, 1925.

UNITE@ STATES PATENT oFFlcE.

BENJAMIN BROIDO, OF NEW YORK, N. Y., AS'SIGNOR TO THE SUPERHEATER COMPANY,

0F NEW YORK, N. Y., A CORPORATION OF DELAWARE.

EXHAUST-STEAM INJECTOR.

Application filed October 30, 1923. Serial No. 671,810.

T0 all 'whom t may concern.'

Be it known that l, BENJAMIN Bnorno, a citizen of the United States, and resident of the borough of Manhattan, city and State of New York, have invented certain new and useful Improvements in Exhaust-Steam Injectors, of which the following is a speciication.

This invention relates to injectors and particularly to that type of injectors shown in United States Patent No. 1,342,128, granted June 1, 1920, to James Metcalfe et al., wherein is disclosed on injector adapted to be operated by the exhaust steam from an engine.

In this type of injector, supplementary supply of live steam is used to augment the exhaust steam when the pressure of said exhaust steam falls below an amount sufficient to ensure the proper functioning of the injector. 1n addition to the lsaid supplemental supply of live steam aird auxiliary supply of live steam is also provided for operating the injector, if necessary, when the engine is not running. Heretofore it has been the practice to provide manually operable valves to control the admission of the steam through the supplemental and auxiliary steam inlets and due to the provision of these manually operable valves it has been found that some engineers in order to avoid giving the required time and attention to the manipulation of the valves, will leave the valve turned on when there is no necessity for doing so, thereby causing the waste of live steam which it is the primary purpose of the exhaust steam operated injectors to conserve.

The principal object of this invention is to provide a new and improved construction of the type referred to by means of which the construction and operation of the device is considerably simpliiied and the admission of live steam to the injector is automatically controlled by variations in the working conditions of the injector.

For the accomplishment of those and such further objects as will be apparent to those skilled in the art to which this invention appertains, my invention consists in the construction, combination and arrangement of parts as shown in the various embodiments which are hereinafter more particularly described and are illustrated in the accompanying drawings forming a part hereof, but it will be understood that changes, variations and modifications may be resorted to without departing from the spirit of my invention.

Referring to the drawings, Fig. 1 is a central longitudinal section through an injector embodying my invention. Fig. 2 is a detail sectional view of a modified form of a pressure actuated device, and Figs. 8 and 4 are views similar to Fig. 1 of two different modications.

As shown in the drawings the injector consists of a casing 10', having a main steam exhaust nozzle 11, a water cone or preliminary mixing nozzle 12, a combining nozzle 18, a delivery nozzle 14, a live steam nozzle 15 and a further preliminary mixing nozzle 16 interposed between the combining nozzle 13 and the water cone 12, all as more particularly set forth in the aforementioned Metcalfe et al. patent.

The live steam nozzle 15, according to my invention, is secured to and communicates with a valve casing 17 which is located within the exhaust steam passage 19, but which casing will permit the passage of the exhaust steam about its outer sides from the valved inlet 20 to the main exhaust steam nozzle 11. Casing 17 is bored to provide a conduit 21, with which the pipe 22 communicates for supplying live steam, thus replacing the former live steam supplies heretofore employed, and which conduit communicates with an enlarged chamber 24, through a plurality of elongated steam admission ports 25, cored out of said casing.

A valve 26 in the shape of a cylindrical plunger is slidably mounted within the valve casing 17 and its lower reduced end passes through a suitable aperture in a partition wall 27 of the valve casing 17, which partition wall divides the live steam chamber 24 from an exhaust steam cylinder 28. A piston head 29 slidably mounted in said cylinder 28 is adapted to be held in Contact with the lower face of the valve or plunger 26 by means of a coiled spring 30, one end of which spring bears against said piston head 29 and the other end of which is adjustably supported by an adjusting nut 31. Nut 81 is screwed into a cylinder head 32 which closes the end of cylinder 28 and S secured thereto by any suitable means.

A conduit 33 connects the lower end oi cylinder 28 with the exhaust steam passage 19.

The operation oi the injector shown in Fig. 1 is as follows, the pressure ot the steam entering exhaust steam passage 19 will be communicated through conduit 3&3 to the lower face of piston head 29 (which it will be noted is of greater diameter than the top face of valve plunger 2G) and will tend to raise piston head 29 and valve 26 against the pressure of' the live steam in conduit 2l. Spring 8O will be adjusted by means of `the adjusting nut 3l, so as to cause the valve 26 to completely close the ports 25 when the pressure ot the exhaust steam is sutlicient to insure continuity ot the jetdelivered by the injector. lt the pressure of the exhaust steam should drop, the pressure oil the live steam in conduit 2l will cause valve 26 and piston head 29 to move downwardly to open the ports 25 to an extent substantially proportional to the drop ot the exhaust steam pressure; the pressure of the steam in conduit 2l decreasing as the extent ot the opening of the ports 25 increases and the upward force of spring 30 increasing as the downward movement ot the valve and piston head increases. lt will be readily understood that the area ot the ports 25 and the tension ot spring BO may be so proportioned as to obtain an automatic compensation 'for the drop of the exhaust steam pressure that will require the use of only a suliicient amount ot live steam necessary to insure the proper operation ot the injector.

In the form ot the invention shown in Fig. 2 the piston head 29 and 'spring 30 are replaced by a movable spring metal diaphragm 4() to which is connected the valve plunger 26a. Diaphragm 40 is clamped between a suitable shoulder 4l, formed by counterbore 42 provided in the easing cylinder 28, and the cylinder head 32Wwhich is provided with screw threads to engage the cooperating screw threads ot counterbore An annular conduit 43 is provided between cylinder head 32a and the cylinder casing, with which conduit the by-pass 33a communicates, and a plurality of ports 44 lead from said conduit to the interior of the cylinder. The operation of the diaphragm in Fig. 2 will be similar to the opera-tion ot the piston head 29 shown in Fig. 1.

In the itorm of my invention shown Fig. 3 the construction and operation the injector are similar to that shown Fig. l with the exception that instead in of actuating the piston head 29 upwardly by the pressure of the exhaust steam. said piston is actuated by the pressure of the water within the delivery pipe 45 of the injector which leads to the boiler, and for this purpose, the cylinder 28 is connected by means of the pipe 46 with said delivery pipe. As the combined jet ot water and steam forced upwardly through the pipe 45 by the injector would tend to produce a suction within the pipe 46, a baille 47 is arranged adjacent to the point of connection of pipe 46 to pipe to minimize the. production oit a suction effect within pipe 46 by the velocity oi the jet in pipe 45.

ln the form shown in Fig. 4 the valve 26h is actuated by the vacuum produced in the vacuum compartment 48 of the injector. A pipe 49 connects said compartment with a cylinder 28h, similar to that shown in Figs. l and 3, but above the piston head 29, instead ot below the same.

The valve 26@ is secured directly as by nut 50, to the piston head 29, and the cylinder head B2b is provided with an aperture 5l to allow the atmospheric pressure to be exerted against the lower iace of the piston head.

When the injector shown in Fig. 4 is operating, it the vacuum in the compartment 4S is not sutiiciently high to insure the proper continuity of action, the pressure of the live steam against the top ot valve plunger 2Gb will cause the plunger 26b and piston 29" to be forced downwardly to open the ports 25. Then sufficient vacuum is maintained in the compartment 48, the atmospheric pressure upon the lower tace ot piston head 29 will overcome the pressure oit the live steam and cause the valve plunger to close ports 25, it being understood that the relative diameters ot plunger 2Gb and piston head 29 will be so proportioned as to secure the operation of the parts.

Various changes in the specific form shown and described may be made within the scope ot the claims without departing Yfrom the nature oi' my invention.

l claim:

l. The combination with an exhaust steam injectorrhaving a plurality ot conduits connected therewith for supplying water, exhaust steam from an engine, and live steam, to said injector, of means for automatically controlling the admission of live steam to said injector, said means comprising a valve for closing the live steam conduit, and Huid pressure actuated means in communication with the interior of said injector for controlling said valve in accordance with the working conditions within said injector.

2. The combination with an exhaust steam injector having an exhaust steam chamber therein and conduits connected with said chamber for supplying thereto exhaust steam from an engine and live steam, of means for automatically controlling the admission of live steam to said chamber, said means comprising a valve for closing the live steam conduit and fluid pressure actuated means in communication with said lll() chamber for controlling the operation of said 'valve in accordance With variations of the pressure of the steam Within said chamber.

8. The combination with an exhaust steam injector having an exhaust steam passage therein and conduits connected with said passage to supply thereto exhaust steam from an engine and live steam, of means to control automatically the admission of live steam in accordance with variations in the pressure of the exhaust steam insaid passage, said means comprising a cylinder, a conduit connecting said cylinder with said passage, a valve to control the admission of live steam to said injector and fluid pressure actuated means Within said cylinder to cause said valve to be operated in accordance with variations in the pressure of the exhaust steam Within said passage.

4. The combination With an exhaust steam injector having an exhaust steam passage therein and conduits connected With said passage to supply thereto exhaust steam from an engine and live steam, of means to control automatically the admission of live steam in accordance with variations in the pressure of the exhaust steam in said passage, said means comprising a cylinder, a con-duit connecting said cylinder With said passage, a valve constructed and arranged to be opened by the pressure of the live steam for controlling the admission of live steam to said injector, and Huid pressure actuated means Within said cylinder for causing said valve to be actuated automatically against the pressure of the live steam in accordance With variations in the pressure of the exhaust steam Within said passage.

5. The combination with an exhaust steam injector having an exhaust steam passage therein and conduits connected with said assage to supply thereto exhaust steam rom an engine and live steam, of means to control automatically the admission of live steam in accordance with variationsin the pressure of the exhaust steam in said passage, said means comprising a cylinder,

a conduit connecting said cylinder with said passage, a valve constructed and arranged to be opened by the pressure of the live steam for controlling the admission of live steam to said injector, and fluid pressure actuated means Within said cylinder to cause said valve to be actuated automatically against the pressure of the live steam in accordance With variations in the pressure of the exhaust steam Within said passage, a spring to supplement the movement of said valve in one direction, and a device to vary the elective pressure of said spring.

6. In an exhaust steam injector having an exhaust steam passage, a conduit connecting said injector with a supply of live steam, said conduit being provided with a port to admit the live steam to said injector, a valve movably mounted in said conduit adjacent to said port to govern the extent of opening thereof, said valve constructed and arranged to be moved by the pressure of said live steamto open said port, a cylinder, a by-pass connecting said cylinder With said exhaust steam passage, and iluid pressure actuated means Within said cylinder for causing said valve to beactuated automatically and thereby control the extent of opening of said port in accordance with the variations in pressure of the exhaust steam.

7. In an exhaust steam injector having a plurality of passages in which the Working conditions of the injector vary, a conduit connecting said injector with a supply of live steam, said conduit being provided With a port to admit the live steam to said injector, a valve movably mounted in said conduit adjacent said port to govern the extent of opening thereof` said valve constructed and arranged to be moved by the pressure of the live steam to open said port, a cylinder, in communication With one of said passages, and fluid pressure actuated means Within said cylinder for causing said valve to be actuated automatically and thereby control the extent of opening of said port in accordance With vvariations in the Working condition within said passage.

BENJAMIN BROIDO. 

